Escherichia coli virulence genes profile of surface waters as an indicator of water quality

Nicole Masters; Aaron Wiegand; Warish Ahmed; Mohammad Katouli

doi:10.1016/j.watres.2011.09.018

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Journal article

Peer reviewed

Escherichia coli virulence genes profile of surface waters as an indicator of water quality

Nicole Masters, Aaron Wiegand, Warish Ahmed and Mohammad Katouli

Water Research, Vol.45(19), pp.6321-6333

2011

DOI: https://doi.org/10.1016/j.watres.2011.09.018

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Abstract

Escherichia coli

virulence factors

surface water

indicator of water quality

We compared the presence of 58 known virulence genes (VGs) associated with Escherichia coli strains causing intestinal (InPEC) and extra-intestinal (ExPEC) infections in three estuarine, four brackish and 13 freshwater sites during the dry and wet seasons. The most common VGs observed in water samples during the dry season belonged to ExPEC (traT; 80% and ompA; 70%) whilst east1 (70%) gene was the most common among InPEC. More types of VGs were observed in water samples during wet season and included those found among InPEC (e.g. eaeA; 100%; fyuA, 90%; paa, 65%; cdt, 60%; and stx2, 60%) and ExPEC (e.g. iroNE.coli, 90%; iss, 90% and kpsMTII, 80%). Eight VGs were found exclusively in the wet season, of which four were found in all three water types indicating their association with storm-water run off. The number of VGs associated with ExPEC were significantly (P < 0.05) higher in only brackish and estuarine waters during the wet season compared to the dry season. There was no correlation between the number of E. coli and the presence of VGs in any of the water types in both seasons but we found similarities in VG profiles of sites with similar land uses.

Details

Title: Escherichia coli virulence genes profile of surface waters as an indicator of water quality
Authors: Nicole Masters (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Aaron Wiegand (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Warish Ahmed (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Mohammad Katouli (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Publication details: Water Research, Vol.45(19), pp.6321-6333
Publisher: IWA Publishing
Date published: 2011
DOI: 10.1016/j.watres.2011.09.018
ISSN: 0043-1354
Organisation Unit: School of Science and Engineering - Legacy; School of Health; University of the Sunshine Coast, Queensland; School of Health and Sport Sciences - Legacy; School of Science, Technology and Engineering; Centre for Bioinnovation; School of Health and Behavioural Sciences - Legacy
Language: English
Record Identifier: 99449533102621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Engineering, Environmental; Environmental Sciences; Water Resources

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